APA-referens (7:e uppl.)

Reubens, B. G. (1970). The hard-to-employ: European programs. Columbia University Press.

Chicago-referens (17:e uppl.)

Reubens, Beatrice G. The Hard-to-employ: European Programs. New York: Columbia University Press, 1970.

MLA-referens (9:e uppl.)

Reubens, Beatrice G. The Hard-to-employ: European Programs. Columbia University Press, 1970.